Sit-up exercise machine

ABSTRACT

The present invention provides an improved sit-up exercise machine that can be used in sitting posture and functions to exercise several parts of belly, which comprises a sit-up chair and an underlay pivotally connected to the front of the sit-up chair. The chair consists of a back-support, a holding rod, and an adjustable axle seat. The adjustable axle seat is disposed on both sides of the chair, pivotally connects the back-support and the holding rod front and rear by pivot connection element on the top surface of the seat and adjusts the angle between the back-support and the holding rod in the range of several sections. Therefore, it can realize body-building and exercise of different parts of belly.

FIELD OF THE INVENTION

The present invention relates to an exercise machine for sit-up in sitting posture. More particularly, to an improved sit-up exercise machine that can be used in sitting posture and functions to exercise several parts of belly.

BACKGROUND OF THE INVENTION

Sit-up is one of the exercises that can help beautify belly and waist part of human body. At present people in our country pay more and more attention to the maintenance of posture, and sit-up becomes more and more popular in daily life. In order to improve the convenience and effect of sit-up, several kinds of sit-up exercise machines provided in market.

Conventional sit-up exercise machine that can be used in both sitting and lying posture, as illustrated in FIG. 7, comprises a sit-up chair 40, which has a head-rest 42 on one end thereof and handgrips 44 that can be held by the user.

Taiwan patent publication No. 494775 disclosed an improved sit-up exercise machine that lies in the sit-up chair can move in the elongated hole. Besides, Taiwan patent publication No. M285366 disclosed another improved sit-up exercise machine that there are several rollers in the central portion of the waist part. However, the above-mentioned constructions are not able to exercise particular parts of the belly according to user's need in practical exercise. It is well known to the exercisers that, more than 6 or 8 abdominal muscles can be formed through exercise. Still, conventional sit-up exercise machine can only make exercisers move from lying posture to bending posture from a fixed lying angle, and the users are subject to doing sit-up exercise blindly, which can only exercise muscles of belly and waist at most, but can not exercise particular parts of belly and waist effectively.

SUMMARY OF THE INVENTION

Accordingly, the main object of the present invention is to provide an improved sit-up exercise machine that can be used in sitting posture and functions to exercise several parts of belly, which comprises a sit-up chair and an underlay pivotally connected to the front of the sit-up chair, and the chair consists of at least a back-support, a holding rod, and an adjustable axle seat, wherein said adjustable axle seat is disposed on both sides of the chair, pivotally connects the back-support and the holding rod front and rear by pivot connection element on the top surface of the seat and adjusts the angle between the back-support and the holding rod in the range of several sections. Therefore, it can realize body-building and exercise of different parts of belly.

Another object of the present invention is to provide an improved sit-up exercise machine that can be used in sitting posture and functions to exercise several parts of belly, which comprises a sit-up chair and an underlay connected to the front of the sit-up chair, the chair consists of a back-support, a holding rod, and an adjustable axle seat, wherein said adjustable axle seat is disposed on both sides of the chair, pivotally connects the back-support and the holding rod on its top surface and adjusts the angle therebetween in four sections: 35°-45°, 55°-65°, 65°-75°, and 80°-95°. Owing to the design of the special angle, the users can exercise four different parts of belly to realize the beautification of particular part.

In order to fulfill the above objects, the present invention adopts the following technical solutions. The sit-up exercise machine according to the present invention, which can be used in sitting posture and functions to exercise several parts of belly, comprises a sit-up chair and an underlay pivotally connected to the front of the sit-up chair. The underlay is in the front of the chair at the position where user's bottom will be put on, and can be connected to the chair by suitable pivot connection element or shaft. The chair consists of a back-support, a holding rod, and an adjustable axle seat that pivotally connects the back-support and the holding rod and adjusts the angle therebetween. Owing to the design of the several special angles, the users can exercise different parts of belly to realize the beautification of particular part.

The adjustable axle seat is fixedly secured to both sides of the chair, engaged with the underlay through a proper fulcrum, which crosses the underlay to be connected to the adjustable axle seat. The adjustable axle seat pivotally connects the back-support and the holding rod front and rear on the top surface of the seat respectively and sets the angle therebetween. The back of the adjustable axle seat is on the ground, so that when the exercisers do sit-up the axle seat and fulcrum can act as a pivot.

The back-support is a retractable hub body in shape of Π, and there are joints at the bottom of both sides of Π, which engages the adjustable axle seat by pivot connection element, and a head-rest that supports the neck of the exerciser at the top of the back-support; also, the back-support can adjust its length according to the height or the length of the upper part of the body of the exerciser to meet their needs adaptively.

The holding rod is a retractable curved support rod, comprising a retractable rod and a lateral grip; the bottom end of the retractable rod is pivotally connected to the adjustable axle seat in a suitable manner so that the holding rod extends upward therefrom and the end far from the adjustable axle seat bends inward to form a lateral grip for the exerciser to hold and press; the retractable rod can adjust its length according to the length of the arm of the exerciser to meet their needs adaptively.

The exercise can sit on the underlay in sitting posture and adjust the angle between the back-support and the holding rod to a suitable degree with the adjustable axle seat, with the upper part of the body lying against the back-support and the hands holding the grip of the holding rod, and with the adjustable axle seat as the pivot, to let the upper part of the body move toward the lower part of the body to do sit-up exercise. If the belly is divided into four sections, from the above they are the first section, the second section, the third section and the fourth section of belly. When the adjustable axle seat sets the angle between the back-support and the holding rod to the extent in the range of 35°-45°, the exerciser can do exercise aiming at the beautification of the first section of belly; when the angle is in the range of 55°-65°, the exerciser can do exercise aiming at the beautification of the second section of belly; when the angle is in the range of 65°-75°, the exerciser can do exercise aiming at the beautification of the third section of belly; when the angle is in the range of 80°-95°, the exerciser can do exercise aiming at the beautification of the fourth section of belly.

BREIF DESCRIPTION OF THE DRAWINGS

The foregoing aspects, as well as many of the attendant advantages and features of this invention will become more apparent by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is the perspective view of the preferred embodiment according to the present invention;

FIG. 2 is the perspective view of carrying out the preferred embodiment according to the present invention;

FIG. 3 illustrates the four angles between the back-support and the holding rod of the preferred embodiment according to the present invention;

FIG. 4 illustrates the retractable back-support and retractable holding rod;

FIG. 5 illustrates the movement of the preferred embodiment according to the present invention;

FIG. 6 is an exploded view of the belly; and

FIG. 7 illustrates the conventional sit-up machine.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Further features, objects and advantages will be evident from the following detailed description of the preferred embodiments of the present invention taken in conjunction with the accompanying drawings.

With reference to FIG. 1 and FIG. 2, the sit-up exercise machine used in sitting posture and functions to exercise several parts of belly provided by the present invention comprises a sit-up chair 1 and an underlay 2 connected to the sit-up chair 1. The underlay 2 is disposed in the front of the chair at the position where user's bottom will be put on, and can be pivotally connected to the chair 1 by suitable pivot connection element or shaft. The chair consists of a back-support 11, a holding rod 12, and an adjustable axle seat 13 which pivotally connects the back-support 11 and the holding rod 12 and adjusts the angle θ therebetween. Owing to the design of the several special angles θ, the users can exercise different parts of belly to realize the beautification of particular part.

Underlay 2 is a convex seat consisting of a bottom support 21 and a waist support 22 extending backwards from bottom support 21. Bottom support 21 correspond to the place people sit on, and has anti-slip striation 211 on the surface to reinforce the friction between the underlay 2 and people's bottom so that the exerciser will not glide to other position when doing sit-up. Besides, there is a notch 212 on each side of bottom support 21 for the exerciser to grasp when stopping sit-up or getting up. The waist support 22 is in shape of arc corresponding to the camber line of the waist. When the exerciser is lying, the place of the waist corresponds with the waist support 22, and the design of arc can make sure the backbone will not be injured in the movement and thus avoids the existing problems in sit-up exercise.

The adjustable axle seat is fixedly secured to both sides of the chair, engaged with the underlay 2 through a proper fulcrum C, which crosses the waist support 22 of the underlay 2 to be connected to the adjustable axle seat 13. The adjustable axle seat 13 pivotally connects the back-support 11 and the holding rod 12 and sets the angle therebetween. On the top of the adjustable axle seat 13 is a groove 131 with pivot connection element disposed therein to pivotally connect holding rod 12 and back-support 11, which are pivotally connected front and rear in the groove 131 respectively. The back of the adjustable axle seat 13 is on the ground, so when the exercisers do sit-up the axle seat 13 can act as the pivot. There is a gear shift element 132 on the side face of the adjustable axle seat 13 which can set the angle θ between the holding rod 12 and the back-support 11. In this preferred embodiment, the gear shift element is an actuate slot divided into four sections, connected with the side face of the holding rod by coupling element, so the holding rod can glide along the slot so that the holding rod 12 can be adjusted to form angle θ₁ (35°-45°), θ₂ (55°-65°), θ₃ (65°-75°) and θ₄ (80°-95°), as illustrated in FIG. 3.

With reference to FIG. 4, The back-support 11 is a retractable hub body in shape of Π, and there are joints at the bottom of both sides connecting with the adjustable axle seat 13 by pivot connection element, and a head-rest 111 that supports the neck of the exerciser at the top of the back-support 11; in this embodiment the head-rest is a cavernous body; also, as illustrated in FIG. 3, the back-support can adjust its length according to the height or the length of the upper part of the body of the exerciser to meet their needs adaptively.

Further, referred as FIG. 4, the holding rod 12 is a retractable curved support rod, comprising a retractable rod 121 and a lateral grip 122; the bottom end of the retractable rod 121 is pivotally connected with the adjustable axle seat 13 and the distal end of the holding rod 12 bends inward to form a lateral grip 122 for the exerciser to hold and press; as illustrated in FIG. 3, the retractable rod 121 can adjust its length according to the length of the arm of the exerciser to meet their needs adaptively.

The exerciser can sit on the underlay 2 in sitting posture and adjust the angle between the back-support 11 and the holding rod 12 to a proper degree with the adjustable axle seat 13, with the upper part of the body lying against the back-support 11 and the hands holding the grip 122 of the holding rod 12, with the adjustable axle seat 13 as the pivot, to let the upper part of the body move toward the lower part of the body to do sit-up exercise, as illustrated in FIG. 5.

As illustrated in FIG. 3 and FIG. 6, the belly 3 is divided into four sections, from the above they are the first section 31, the second section 32, the third section 33 and the fourth section 34 of belly. When the adjustable axle seat 13 sets the angle θ between the back-support 11 and the holding rod 12 to the degree of θ₁ (35-45), the exerciser can do exercise aiming at the beautification of the first section 31 of belly; when the angle is θ₂ (55°-65°), the exerciser can do exercise aiming at the beautification of the second section 32 of belly; when the angle is θ₃ (65°-75°), the exerciser can do exercise aiming at the beautification of the third section 33 of belly; when the angle is θ₄ (80°-95°), the exerciser can do exercise aiming at the beautification of the fourth section 34 of belly.

The preferred embodiment disclosed is only for illustrating the present invention, and not for giving any limitation to the scope of the present invention. It will be apparent to those skilled in this art that various modifications or changes can be made to the present invention without departing from the spirit and scope of this invention. Accordingly, all such modifications and changes also fall within the scope of protection of the appended claims. 

1. An improved sit-up exercise machine that functions to exercise several parts of belly, comprising: a sit-up chair and an underlay pivotally connected to the front of the sit-up chair, said chair consists of a back-support, a holding rod, and an adjustable axle seat, wherein said adjustable axle seat is disposed on both sides of the chair, pivotally connects the back-support and the holding rod front and rear by pivot connection element on the top surface of the seat and adjusts the angle between the back-support and the holding rod in the range of several sections.
 2. The sit-up exercise machine as claim 1, wherein said underlay consists of a bottom support and a waist support extending backwards from the bottom support.
 3. The sit-up exercise machine as claim 1, wherein said underlay has notches on both sides thereof for grasp.
 4. The sit-up exercise machine as claim 1, wherein said underlay has anti-slip means.
 5. The sit-up exercise machine as claim 3, wherein said waist support is in shape of arc.
 6. The sit-up exercise machine as claim 1, wherein said back-support is retractable.
 7. The sit-up exercise machine as claim 1., wherein said holding rod is retractable.
 8. The sit-up exercise machine as claim 1, wherein said adjustable axle seat can adjust the angle between said back-support and said holding rod in the range of four section.
 9. The sit-up exercise machine as claim 8, wherein the range of the first section angle is within 35°-45°.
 10. The sit-up exercise machine as claim 8, wherein the range of the second section angle is within 55°-65°.
 11. The sit-up exercise machine as claim 8, wherein the range of the third section angle is within 65°-75°.
 12. The sit-up exercise machine as claim 8, wherein the range of the fourth section angle is within 80°-95°. 